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haram 'WILLIAM s. wears, or sopra BENI), INDIANA, JASSIGNOB; ro BE'NDIX sn-mm comrew, or SOUTH BENI), INDIeNA, A CORIEORATIQN or ILLINOIS emm Application filed July 22, 1929. SerialNo. 380411.

This invention relates to Operating mechanism and is illustrated as embodied in a novel arm mounted on the cam shaft of a hrake structure for an automobile wheel.

An object of the invention isto provide a light but rigid crank arm on the end of a shaft, which arm is capable of ready adjustment with respect to the shaft to com pensate for the wear of the brake;

indicatecl in one embodment of my invenln one desirable arrangement, the novel crank arm is of channel section and is rein- 'orced at its respective ends to provide a hearing structure for the shaft to which its connected ,and a novel thrust element. As

tion, the arm may be fabricated from channel section stock, 'the base portion of which may be extended at one end to form a tongue return bent to form a hearing for the shaft k to which the arm is mounted. At the ap- V plying end of the arm one side wall of the channel may beextended across the arm par-' allel with the base or the channel to provide a hearing within which is journaled the aforementioned thrust element.

The above and other objects and features of the inventio'n, including various novel and desirable details of Construction will become apparent from the following description of the embodiments 'of the invention shown in the accompanying drawing in whichg Figure 1 is a side elevation of my novel hrake applying arm; i

Figure 2 s an end elevation of the arm.

disclosed in Figure 1;

Figure 3 is a partial vertical section through the novel brake applying means showingthe brake Operating shaft in side elevation;

Figure %tis a transverse section taken on. the line 4-4 of Figura 1; i

Figure 5 is a transverse section through the arm and its thrust element taken on the line '5-5 of Figure 1;

Figure, 6 is a sectional view substaftially on line 6-'-6, Figura 1;

Figure 7 is a view similar to Figure -l' showing in side elevation a modified form of my novel brake applying arm; and

igures 1 and Figure 8 is end -elevation of the' arm disclosed in Figure 7.

The novel Operating mechanism selected- ;tor illustration in Figures 1 to 6, inclusive., includesa brakeapplying shaft 10 arranged to he journaled in a support such as the 4 hacking plate 11 of the brake which shaft carries an operating arm 12 at its end and which arm constitutes the essential feature of my invention. 1

The novel crank arm is preferably fabricated from a channel sectioned stamping, the lower power applying end of which is curved to one side and outwardly, as indicated in 2, to space the thrust end conveniently from the axis of the the aforementioned power applying end of the lever, the same is preferably continued from one of the side walls parallel to the base of the channel and superposed at its end upon the peripheral surface' of a cut-away portion' of the remaining side wall to thus' form a square-sectioned end of the arin serving as a hearing for a thrust element l l threadedwithin said end and headed at one ofits ends at 16. The thrust element i preferably clamped in its adjusted position in the arm by a nut 18. At its other end, my novel crank arm 'is preferably reinforced by a channel- .sectioned stamping 20 Iwhich is telescoped within the channel of the arm, as indicate& in Figure 3. This telesfoping reinforcing stamping is preferably elded to the side walls of the arm at points 21, as indicated in Figure 1. The material of both the arm and reinforcement may then be slotted, as indicated in Figures l and L and further recessed to accommodate the 'brake shaft 10. A binding bolt 22' may be threaded through the projections formed by said' slotting, which bolt i shaft' 10. At

of the channel-sectioned arm may be extehded to forma tongue member 24 return bent to surround the brake shaft and formingfwith the curved recessed side walls of the channel V 5 of the ar m a bearin for said shaft. Binding means' such as a `olt 26 may be extended through the end of the tongue and base of the channel'to secure theangular adjustment in a' manner similar to 'the structure dislo 'closed in Figure 1.- At its thrust end the crank arm disclosed in the embodiment of gFigure 7 is similar to that disclosed in Figure I. L

There is thus provided a very cheap and efl'ective brake Operating element the central portion of which is of channel section' contour to withtand the severe bending movement at this point to which this arm is subjected with *brake application: The thrust elements 14 are adapted to be con tacted by alever or equivalent Operating mechanism of `the brake connected by suitable trans nission linkage with the serv ce pedal. r

ile several illustrative embodiments have been described in detail, it is not my intention tolimit the scope of the invention to v those particular embodiments or otherwise than by the scope of the appended claim s. I claim: 36 1. Brake applying means comprisng, in combination with a shaft, a channel-sectioned.

` stampng constituting a crank arm, 'one end of which is closed to form a box-sectioned structure and the`other end of which is de'- "tachably Secured to the shaft to angularly i adjust the applying means with respectthereto. i u

2. Operating means comprising, in combination 'achannel-sectioned tamping constituting crank arm said stamping having at one end thereof one of its side walls extended' in parallelism with the base of the channel ;to form a squar-sectio'ned bearing.for a thrust element passing therethrough. w

65 3. Acrank arm characterized byachannel ectioned stamping provided at one of its 'I slottd to form a ends with a U shaped stamping telesoping within said channel and permanently Secured `thereto to reiforce aid end. 4. A crank arm characterized by a channelsectioned stamping provided at one of its ends with a U shaped stamping telescoping within said channel and permanently Secured thereto to reinforce said end, -said end parts being hearing surface for a shaft extending therein. v In testimony 'whereof, I have hereunto signed my name. 7 S. WATTS. J

v 1 I I 

